Neutral Grounding Resistors


  • SE-325

  • The SE-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to ...More

  • Supply
    Voltage
    (VAC):
     120, 240

  • Supply
    Voltage
    (VDC):
     120

  • Relay
    Contacts:
     One Form A (N.O.)

  • PGN-3000

  • The PGN Pulsing High-Resistance-Grounding Systems are used to ground power systems by inserting a re...More

  • Supply
    Voltage
    (VAC):
     Consult Factory

  • Supply
    Voltage
    (VDC):
     Consult Factory

  • Approvals: Consult Factory

  • NGR

  • Neutral-Grounding Resistors (NGRs) are used to ground power systems by inserting a resistor between ...More

  • Supply
    Voltage
    (VAC):
     Consult Factory

  • Supply
    Voltage
    (VDC):
     Consult Factory

  • Approvals: Consult Factory

  • PGR-5330

  • The PGR-5330 is an advanced ground-fault and resistor monitoring relay. The PGR-5330 measures neutra...More

  • Supply
    Voltage
    (VAC):
     65 - 265

  • Supply
    Voltage
    (VDC):
     80 - 265, 32 - 70

  • Relay
    Contacts:
     Two Form A (N.O.); Two Form C (N.O./N.C.)

Resistance Grounding eliminates transient overvoltages and single phase Arc-Flash hazards by reducing the ground-fault current to 5 A, as well as the ability to locate the ground fault. Per IEEE Standard 141-1993, Arc-flash hazards are eliminated if the ground-fault current is reduced to 5 A or less. For systems 2.4 kV and higher, low-resistance grounding systems can be used. Properly sized resistance grounding systems solve two problems of ungrounded systems—transient overvoltages and difficulty locating ground faults.

These capabilities reduce unscheduled shutdowns due to electrical faults and equipment damage. The PGN Family of Resistance Grounding Systems include all necessary components to convert or design a resistance- grounded system. Additional ground-fault relays, such as the PGR-4704, PGR-5300 or the PGM-8325 can be installed additional functions such as coordination as well as the ability to locate ground faults.